486 GLACIAL FOKMATIONS OF ERIE AND OHIO BASINS. 



level of the surrounding country, and can not therefore be a product of 

 erosion, but instead is a true glacial product, formed perhaps within or 

 beneath the confinement of ice walls. 



The records of a few wells along the line of the feebly ridged belt 

 leading northwestward from Muncie are here presented. 



At Alexandria rock is quarried in the bed of Pipe Creek. The drift 

 in the gas borings is 22 to 28 feet thick, but the borings were made on 

 ground standing 20 feet or more above the creek; the rock surface has 

 therefore about the same altitude as in the outcrops. The following is the 

 section of the boring near the Lake Erie and Western Railway station, in 

 the southeastern part of the village: 



Drift penetrated in ioring at Alexandria, Ind. 



Feet. 



Soil and gravel 6 



Blue clay 16 



Disturbed rock , 6 



Limestone, etc. 



At Summitville a gas boring was made on low ground west of the 

 village at an altitude about 885 feet above tide, which penetrated 110 feet 

 of drift, of which the upper 15 feet is yellow clay and the remainder gravel. 



At Fairmount the gas borings penetrate less than 20 feet of drift. 

 They are located in the valley of Back Creek, 25 feet or more below the 

 level of the uplands. This valley is remarkably broad for so small a stream, 

 and appears to have been formed by a subglacial stream leading south- 

 ward, or the reverse of the present flow. The valley bottom and bluffs 

 are lined with gravel, but a short distance back from the brow of the 

 bluffs the drift appears to be mainly till. 



At Point Isabel the gas boring is in' a ravine and strikes rock at 22 

 feet. The di'ift is mainly sand. On the bordering upland, including the 

 drift knolls, the drift is mainly till. 



At Sims a well driller reported the following section of drift in tlie 

 first gas well made in the village: 



Drift in gas horing at Sims, Ind.' 



Feet. 



Yellow and blue till 22 



Gravel 4 



Blue till and bowlders 12 



Gravel 6-7 



Total 45 



